DTC C1222

id040200801500

Note

• DTC C1222 will be detected when a malfunctioning ABS wheel-speed sensor cannot be specified.

DTC

C1222

ABS wheel-speed sensor (slip monitor) system

DETECTION CONDITION

•  Difference between any vehicle wheel speeds exceeds specification when driving at a constant speed.

•  ABS control operates for 60 s or more.

POSSIBLE CAUSE

•  Excessive clearance between the ABS wheel-speed sensor and sensor rotor

•  ABS wheel-speed sensor malfunction (low output, metal shavings on sensor)

•  ABS sensor rotor malfunction (chipping of sensor rotor teeth)

•  Poor installation of ABS wheel-speed sensor and/or sensor rotor (If the sensor rotor is installed at an angle, it may cause output of abnormal wave pattern at high speeds.)

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT PID FOR ABS WHEEL-SPEED SENSOR OUTPUT ERROR USING M-MDS • Turn the ignition switch off. • Connect the M-MDS to the DLC-2. • Select the following PIDs using the M-MDS: WSPD_LF WSPD_LR WSPD_RF WSPD_RR • Drive the vehicle. • Verify that the vehicle speeds detected by the four ABS wheel-speed sensors are approximately the same. • Are the vehicle speeds approximately the same?	Yes	Go to Step 4.
1		No	Go to the next step.
2	INSPECT IF MALFUNCTION OCCURRED DUE TO IMPROPER SENSOR CLEARANCE. • Inspect the clearance between the ABS wheel-speed sensor and the ABS sensor rotor. (See FRONT ABS WHEEL-SPEED SENSOR INSPECTION.) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION [2WD].) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION [4WD].) • Is the clearance normal?	Yes	Go to the next step.
2		No	Replace the ABS wheel-speed sensor, then go to Step 4. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.) (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION [2WD].) (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION [4WD].)
3	VISUALLY INSPECT ABS SENSOR ROTOR FOR FOREIGN MATERIAL ADHERING OR IMPROPER INSTALLATION • Is the result normal?	Yes	Go to the next step.
3		No	Replace the front drive shaft, rear wheel hub component (2WD) or rear drive shaft (4WD), then go to the next step. (See FRONT DRIVE SHAFT REMOVAL/INSTALLATION.) (See WHEEL HUB COMPONENT REMOVAL/INSTALLATION [2WD].) (See REAR DRIVE SHAFT REMOVAL/INSTALLATION.)
4	VERIFY THAT THE SAME DTC IS NOT PRESENT • Clear the DTC from the memory. (See ON-BOARD DIAGNOSIS.) • Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more. • Are the same DTCs present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D.].) (See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)
4		No	Go to the next step.
5	VERIFY THAT NO OTHER DTCS ARE PRESENT • Are any other DTCs output?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS.)
5		No	DTC troubleshooting completed.

DTC	C1222		ABS wheel-speed sensor (slip monitor) system
DETECTION CONDITION		• Difference between any vehicle wheel speeds exceeds specification when driving at a constant speed. • ABS control operates for 60 s or more.
POSSIBLE CAUSE		• Excessive clearance between the ABS wheel-speed sensor and sensor rotor • ABS wheel-speed sensor malfunction (low output, metal shavings on sensor) • ABS sensor rotor malfunction (chipping of sensor rotor teeth) • Poor installation of ABS wheel-speed sensor and/or sensor rotor (If the sensor rotor is installed at an angle, it may cause output of abnormal wave pattern at high speeds.)